Rep Power: 0

First, I own a 2001 Civic LX 5-speed. I cleaned my TB, which really made the engine rev crazy (3,500 RPM in the moring and 1,900 RPM when hot),so I adjusted the idle, which now seems to be fine while the engine is warm, but when I start the car in the morning it still revs at 2,100 RPM for about 5 seconds, then lowers to 1,400 RPM for the next 5 minues, then finally settles at around 790 RPM when the engine is at operating temperature. Is this 2,100 RPM idle normal when I first start my engine when it's cold? Or should I lower the idle a little more?

 
Rep Power: 812

normal. depending on how cold it is outside, it could rev even higher. ive had mine almost at 3k when its 0F in winter.

 
Rep Power: 353

hehe........so cal.....never gets THAT cold...ever in the morning.... =]

 
Rep Power: 0

the highest ive seen in my car is 1500

but im in hawaii.. the coldest ive seen hawaii drop to at sea level is 55F but thats rare. 65F is normal in the so called winter we have and 70-75F during the summer. if you go up in the mountains u can see temps in the 35-40F and in the big island theres snow so it hits 28-32F

 
Rep Power: 297

The computer controls the idle. Mechanically adjusting it is only a temporary fix at best. You may have a slight vaccuum leak. It would be more noticable with a cold start until everything expands and the computer see warmer coolant temp. If you took off your TB to clean it, check the TB o-ring seal and make sure it didnt get pinched. If you happened to disassemble the IAC valve check that seal too. Also check any rubber vaccuum hoses for cracking or abrasions. More info would make it easier ro diagnose. Vaccuum leaks are pretty common so that would be my first guess.